package org.lt.resume.util.common.domain;

public class Pager { 
	  private int totalRows; //总行数 
	  private int pageSize = 10; //每页显示的行数 
	  private int currentPage; //当前页号 
	  private int totalPages; //总页数 
	  private int startRow; //当前页在数据库中的起始行 

	  public Pager() { 
	  } 

	  public Pager(int _totalRows) { 
	    totalRows = _totalRows; 
	    totalPages=totalRows/pageSize; 
	    int mod=totalRows%pageSize; 
	    if(mod>0){ 
	      totalPages++; 
	    } 
	    currentPage = 1; 
	    startRow = 0; 
	  } 

	  public int getStartRow() { 
	    return startRow; 
	  } 

	  public int getTotalPages() { 
	    return totalPages; 
	  } 

	  public int getCurrentPage() { 
	    return currentPage; 
	  } 

	  public int getPageSize() { 
	    return pageSize; 
	  } 

	  public void setTotalRows(int totalRows) { 
	    this.totalRows = totalRows; 
	  } 

	  public void setStartRow(int startRow) { 
	    this.startRow = startRow; 
	  } 

	  public void setTotalPages(int totalPages) { 
	    this.totalPages = totalPages; 
	  } 

	  public void setCurrentPage(int currentPage) { 
	    this.currentPage = currentPage; 
	  } 

	  public void setPageSize(int pageSize) { 
	    this.pageSize = pageSize; 
	  } 

	  public int getTotalRows() { 
	    return totalRows; 
	  } 

	  public void first() { 
	    currentPage = 1; 
	    startRow = 0; 
	  } 

	  public void previous() { 
	    if (currentPage == 1) { 
	      return; 
	    } 
	    currentPage--; 
	    startRow = (currentPage - 1) * pageSize; 
	  } 

	  public void next() { 
	    if (currentPage < totalPages) { 
	      currentPage++; 
	    } 
	    startRow = (currentPage - 1) * pageSize; 
	  } 

	  public void last() { 
	    currentPage = totalPages; 
	    startRow = (currentPage - 1) * pageSize; 
	  } 

	  public void refresh(int _currentPage) { 
	    currentPage = _currentPage; 
	    if (currentPage > totalPages) { 
	      last(); 
	    } 
	  } 

	} 

